Simulation of the growth of copper critical nucleus in dilute bcc Fe–Cu alloys

The composition of Cu particles formed during isothermal aging in bcc Fe–Cu alloys was simulated using the Cahn–Hilliard nucleation theory and non-linear diffusion equation. Whereas Cu nuclei are almost pure Cu in low Cu content alloys, the Cu concentration in the nucleus is significantly less than...

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Published inScripta materialia Vol. 55; no. 3; pp. 223 - 226
Main Authors Nagano, Takatoshi, Enomoto, Masato
Format Journal Article
LanguageEnglish
Published New York, NY Elsevier Ltd 01.08.2006
Elsevier Science
Subjects
AGING MECHANISMS
Alloys
Applied sciences
COMPUTER SIMULATION
Copper
COPPER ALLOYS (40 TO 99.3 CU)
Copper base alloys
COPPER IRON ALLOYS
DILUTION
Exact sciences and technology
Ferrous alloys
Growth
Iron alloys
IRON ALLOYS (50 TO 99 FE)
LATTICES (CRYSTAL)
MATHEMATICAL ANALYSIS
Metals. Metallurgy
Nucleation
NUCLEI
Simulation
Unity
Iron alloys
Nucleation
Simulation
Copper
Growth
Germination
Dilute alloy
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Summary:The composition of Cu particles formed during isothermal aging in bcc Fe–Cu alloys was simulated using the Cahn–Hilliard nucleation theory and non-linear diffusion equation. Whereas Cu nuclei are almost pure Cu in low Cu content alloys, the Cu concentration in the nucleus is significantly less than unity in higher Cu content alloys. During aging it increases almost to unity at an early stage and the increase in particle radius follows. Experimental evidence in the latter alloys is yet to be obtained.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6462
0956-716X
1872-8456
DOI:10.1016/j.scriptamat.2006.04.015